Choose input style button not appearing in SQL Expression Builder

[ShawnMcArdle]

I am attempting to add a 'Filter' widget in my ArcGIS experience builder app. I would like to have a dropdown menu for one of my attributes where users can select which attribute to display on the map. However, the 'Choose input style' button is not appearing. Is there a way to restore this an alternative way to add my aforementioned feature? I have attached screenshots.

How my widget looks:

ShawnMcArdle_1-1729705301334.png

What I'm looking for (from a tutorial):

ShawnMcArdle_0-1729705250074.png

[ShawnMcArdle]

Nevermind - resolved

[JeffreyThompson2]

JeffreyThompson2_0-1729711295739.png

For the button option, you first need to set the Select Source Type value to Unique.